
<template>
  <div class="list" ref="wrapper">

    <div>

      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>

      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">

          <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>

        </div>
      </div>

      <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="innerItem of item"
               :key="innerItem.id"
               @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>

    </div>

  </div>

</template>

<script>
  import Bscroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'
  export default {
    name:'CityList',
    props:{
      hot:Array,
      cities:Object,
      letter:String
    },
    computed:{
      ...mapState({
        currentCity: 'city'
      })
    },
    methods:{
      handleCityClick (city){
        this.changeCity(city);
        this.$router.push('/');
      },
      ...mapMutations(['changeCity'])
    },
    watch: {
      letter (){
        if(this.letter){
          const element = this.$refs[this.letter][0];
          this.scroll.scrollToElement(element);
        }
      }
    },

    mounted(){
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
  }
</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
    &:before
      border-color:#ccc
    &:after
      border-color:#ccc
  .border-border-bottom
    &:before
      border-color:#ccc
.list
  position :absolute
  overflow :hidden
  top:1.58rem
  left:0
  right:0
  bottom:0
  .title
   line-height :.54rem
   background :#eee
   padding-left:.2rem
   color:#66666
   font-size :.26rem
  .button-list
    overflow :hidden
    padding:.1rem .6rem .1rem .1rem
    .button-wrapper
      width: 33.33%
      float :left
      .button
        border-radius :.06rem
        padding:.1rem 0
        text-align :center
        margin :.1rem
        border :.02rem solid #ccc
  .item-list
    .item
      line-height :.76rem
      padding-left :.2rem


</style>
